Answer:
A. Experiment help explain scientific theories
Answer:
The answer is compound because they consist of multiple things.
Answer:
Explanation:
well it needs water like us to stay alive
The answer to this question would be B. hydrogen.
Two polar molecules can make hydrogen bond which was found in many polar molecules.
One example of hydrogen bond would be in the water. Water is a polar molecule with a positive end at the hydrogen side. Hydrogen bond in water is formed by molecule to molecule bond that looks like tetrahedral.
The concentration in ppm = 125,000 ppm
<h3>Further explanation</h3>
The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.
ppm or parts per million (ppm) :
For water solvent = 1 ppm ⇒ 1 mg/L(1 kg=1 L,ρ water=1 kg/L)
In percent mass = 1 ppm ⇒ 1 mg/ 1 kg
Solution contains 0.25 kg of lead in 2 kg of water :
Solvent = water = 2 kg = 2 L
Solute= lead=0.25 kg=250000 mg
So the concentration in ppm :